Need help with front disk brake

[KATANA-BRASIL]

I have traced the forum but I still haven't found what I'm locking for
I have a 95 - 750 Kat
Last sunday when I was calibrating the tires I decided to check front disks , for my surprise you can move it, its normal take the disk with fingers and move it front and back ???
I've checked the rear and its fixed no move.
Driving the bike breaks function very well and there is no sound.
I have checked the repair manual and saw that break disks its floating but a gap that you can fell with hands its normal??
Can I do someting to fix the rivets??

Thanks if someone can help me

Obs: Sorry for my horrible english

[chrisx2]

Doesn't sound right. I'd think the disk would be fastened solid to the hub. Perhaps post a video of what you're seeing. That would help.

[05RedKat600]

Doesn't sound right. I'd think the disk would be fastened solid to the hub. Perhaps post a video of what you're seeing. That would help.

They aren't. The outer disc the pads ride on is separate from the part that bolts to the hub. There are "rivets" joining the two by pressure, hence the term "floating" rotors. Some play is normal.

The picture below is a good example.....6 rivets separating the two parts. Notice the gap in between the hub and the disc also?

[Slofuze]

That definitely doesn't sound right.

[KATANA-BRASIL]

Thank you very much for the picture now will be easier to explain

Yes, the play its in the outer disk that pads ride, the "iner" disk its fasted and solid
So the play its normal I was afraid because the play its something like 2 or 3 centimeters
What's the maximum play acceptable??
There is a way to press the rivet's ??

[05RedKat600]

2-3 CM is not normal. No way to repair it really so I'd be looking for a new disc.

[KATANA-BRASIL]

I'm so dumb 2 or 3 centimenters its soo much its something like 1 cm in the maximum.

[05RedKat600]

Even 1 CM is too much. Need to think in MM...as in one for two for acceptable play. Not even sure that is acceptable, but I'd probably ride it.

[muffinman]

A video would best describe what it's doing. The kind of movement you are describing is not normal or safe IMO.

[KATANA-BRASIL]

Thank you very much
I believe its better visit a mechanical to confirm what I have to do
Do you have an ideia about disk prices in USA? Just to compare because here in Brasil Suzuki parts its very very expensible

[muffinman]

With a quick search it looks like OEM is around $370 each and ebay used start around $60 for both. Ebay also has some aftermarket ones from $170.


I'm not a big fan of ebay parts but some people are. Check around the forum to see if anyone is selling some. GL

[KATANA-BRASIL]

Price isn't soo differente because if I buy in USA there will be freight and dutys and will spend 30 days until conclude the customs clearence, used its complicated.
A friend of mine works in a spare parts factorys I'll call him and check the possibility to repair this one if yes I'll post here for other people help

Thank you very much for Katrides assistance this forum its really amazing

[Mojoe]

I don't think I owned a katana where the discs didn't have play in them. I think you are off on your calculations as well. seriously, if you aren't hearing any noise or feeling any vibration, I wouldn't even worry about. and I especially wouldn't try to fix it, seeing as all you can really do is add a few tons of pressure to the rivets with a press in hopes of squishing them out a bit to take up the slack.....but can also lead to a lightly tweaked disc.

[KATANA-BRASIL]

Yesterday I've spoken with my engenier friend a and he sad that a small play its really normal, he also sad about the possibility informed by Monjoe put pressure in the rivets but depending the pressure can warp the disc.
I made a test yesterday went until 190 Km / Hour and used just front brakes, it was perfect no noise, no vibration so I'll keep riding in this way
Next month a friend of mine will travel to USA so I'll ask to him bring some disk and some other stuff oil filter, sprockets just to have in stock
Thank you very much for the help my friends

[brentwoodkris]

I made a test yesterday went until 190 Km / Hour and used just front brakes, it was perfect no noise, no vibration so I'll keep riding in this way

You went 120mph on a Katana to "test" the brakes? Am I the only one that thinks that is crazy?